I completed my LLB in 2014. I decided to not become a lawyer but instead I work in the public service.

But my dream goal is to live and work in the USA. I understand that it is not very possible to work in the USA with only an LLB so I would like to do MBA.

Which MBA should I do. I do not wish to take the GMAT but if I have to do it I will. Can I substitute the TOEFL or the GRE instead?

Please give me advice, on where to begin.

Your questions suggest that you have not researched this much. Please search the board for similar questions, perhaps using key words like Indian and H1B. In a nutshell, go to Canada instead after taking the GMAT.

In general many business schools will take the GRE instead of the GMAT, but even if they accept both many tend to prefer the GMAT.

The TOEFL may or may not be required separately but it's not really used as a substitute for the GMAT/GRE.

If you're planning on working in the USA for best results you'd want to do a ranked MBA program.

Of course, to be competitive at most ranked MBA programs, you'll need about 4-6 years of work experience. If you graduated in 2014 this might be challenging. You may want to aim to start in fall 2019.

Also, you'll need a solid, well balanced GMAT score. 700 is a good baseline goal.

But like Duncan suggests, it's best to do some research. If you're looking to live abroad long-term, the USA, since its H1B visas are rewarded on a lottery system, might not be the safest option.